AudioCodes Mediant 1000 User Manual page 406

Parameter
k]
Quality of Experience
RTP IP DiffServ
rtp-ip-diffserv
[IpProfile_IPDiffServ]
Signaling DiffServ
signaling-diffserv
[IpProfile_SigIPDiffServ]
Jitter Buffer
Dynamic Jitter Buffer
Minimum Delay
jitter-buffer-minimum-delay
[IpProfile_JitterBufMinDelay]
Dynamic Jitter Buffer
Optimization Factor
User's Manual
according to RFC 5124, during RTP profile negotiation between two
communicating SIP entities. RFC 5124 defines an RTP profile
(S)AVPF for (secure) real-time communications to provide timely
feedback from the receivers to a sender. For more information on
RFC 5124, see http://tools.ietf.org/html/rfc5124.
Some SIP entities may require RTP secure-profile feedback
negotiation (AVPF/SAVPF) in the SDP offer/answer exchange, while
other SIP entities may not support it. The device indicates whether or
not feedback is supported on behalf of the SIP entity. It does this by
adding an "F" or removing the "F" from the SDP media line ('m=') for
AVP and SAVP. For example, the following shows "AVP" appended
with an "F", indicating that the SIP entity is capable of receiving
feedback
m=audio 49170 RTP/SAVPF 0 96

[0] Feedback Off = (Default) The device does not send the
feedback flag ("F") in SDP offers/answers that are sent to the SIP
entity. If the SDP 'm=' attribute of an incoming message that is
destined to the SIP entity includes the feedback flag, the device
removes it before sending the message to the SIP entity.

[1] Feedback On = The device includes the feedback flag ("F") in
the SDP offer sent to the SIP entity. The device includes the
feedback flag in the SDP answer sent to the SIP entity only if it
was present in the SDP offer received from the other SIP entity.

[2] As Is = The device does not involve itself in the feedback, but
simply forwards any feedback indication as is.
Note: As RTCP-based feedback has been defined by the WebRTC
standard as mandatory, the support is important for deployments
implementing WebRTC. For more information on WebRTC, see
WebRTC.
Defines the DiffServ value for Premium Media class of service (CoS)
content.
The valid range is 0 to 63. The default is 46.
Note: The corresponding global parameter is
PremiumServiceClassMediaDiffServ.
Defines the DiffServ value for Premium Control CoS content (Call
Control applications).
The valid range is 0 to 63. The default is 40.
Note: The corresponding global parameter is
PremiumServiceClassControlDiffServ.
Defines the minimum delay (in msec) of the device's dynamic Jitter
Buffer.
The valid range is 0 to 150. The default delay is 10.
For more information on Jitter Buffer, see Configuring the Dynamic
Jitter Buffer on page 189.
Note: The corresponding global parameter is DJBufMinDelay.
Defines the Dynamic Jitter Buffer frame error/delay optimization
factor.
406
Mediant 1000B Gateway & E-SBC
Description
Document #: LTRT-27045